What's up guys, I'm new to the forum so sorry if I sound like a noob lol anyways so I've been searching all over the web for my problem but i keep getting stumped. I have a 1990 5.0 hatchback, ever since I bought the car it will not turn on after driving it for a bit, or if it gets warm. I've already replaced the TFI module and still same problem. It is getting spark, ignition coil is fine. I don't think my starter is getting heat soaked because the car cranks and all. Not too long ago I had an issue with the car bogging out at WOT and going up hills. I took it to a guy and it ended up being the fuel pump. The funny thing is, that the guy said he had put another ECU in it and it would turn on hot, warm, cold, whenever. He had put an A9P though and my car is a 5speed so it has an A9L. But anyways could the ECU be my problem? I just wanna gather more info before I start spending any cash on replacement parts. Idk if my mods would be helpful to throw out there but here ya go: 24lb injectors, Perfromer rpm 2 intake, bbk cai, 70mm tb, bbk shorty headers, off road x pipe, flowmaster 40s, SCT 4 Bank Eliminator Switch Chip(everything is tuned accordingly except injectors), battery relocated to trunk, subframe connectors, msd ignition coil, ford racing plug wires, shorts shifter, 3:55 gears. Another thing is that if I let cool down for let's say 15 minutes it'll start up but pretty weak. But if I start her up after about two hours she'll start perfectly fine. Well that's that hope you guys can help me out with this problem because it kinda sucks having to explain to people why we have to let my car cool down before going anywhere else also been having this car for about 8 months now so I think it's about time I get to the bottom of this. Oh yeah and I can't pull any codes because previous owners messed with the diagnostic port, wires are cut. Thanks in advance guys!